package demo4;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UserDao {


    Connection connection =SqlConnection.getCon();
    public UserDao() throws ClassNotFoundException, SQLException {
    }
    public int addUser(String username, String password) throws SQLException, ClassNotFoundException {
        Connection connection =SqlConnection.getCon();
        String sql = "insert into users(username,password) values(?,?)";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        preparedStatement.setString(1, username);
        preparedStatement.setString(2, password);
        return preparedStatement.executeUpdate();

    }
    public Users login(String username, String password) throws SQLException, ClassNotFoundException {
        Users users= null;
        int i=1;
        Connection connection =SqlConnection.getCon();
        String sql = "select * from users where username=? and password=?";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        preparedStatement.setString(1, username);
        preparedStatement.setString(2, password);
        ResultSet resultSet = preparedStatement.executeQuery();
        if(resultSet.next()){
            users = new Users();
            users.setId(resultSet.getInt("id"));
            users.setUsername(resultSet.getString("username"));
            users.setPassword(resultSet.getString("password"));
        }
        return users;
    }
    public int deleteUsers(int id) throws SQLException {
        String sql = "delete from users where id=?";
        PreparedStatement preparedStatement  = connection.prepareStatement(sql);
        preparedStatement.setInt(1,id);
        return preparedStatement.executeUpdate();
    }
}
